Heat exchanger, refrigeration cycle apparatus including heat exchanger and air-conditioning apparatus

  • US 9,689,619 B2
  • Filed: 04/23/2013
  • Issued: 06/27/2017
  • Est. Priority Date: 04/26/2012
  • Status: Active Grant
First Claim
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1. A heat exchanger comprising:

  • a plurality of heat exchange units each includinga plurality of heat transfer tubes through which a refrigerant in a gas-liquid two-phase state flows, anda plurality of fins arranged such that air passes between adjacent fins in an air passing direction,the heat transfer tubes being arranged at multiple levels in a level direction perpendicular to the air passing direction, the heat exchange units being arranged in multiple rows in a row direction that serves as the air passing direction; and

    a row straddling header in communication with the heat transfer tubes at first ends of the heat transfer tubes, wherein,the heat exchange units at opposite ends in the row direction of the heat exchange units arranged in the multiple rows serve as an inlet heat exchange unit into which the refrigerant flows, and an outlet heat exchange unit out of which the refrigerant flows,the inlet heat exchange unit having an inlet header in communication with the heat transfer tubes at second ends of the heat transfer tubes,the inlet header, the heat transfer tubes and an outlet header define refrigerant passages through which the refrigerant flows, andeach of the inlet header and the row straddling header has an interior separated into a plurality of chambers arranged in the level direction, each of the refrigerant passages being isolated by corresponding chambers in the inlet header and the row straddling header.

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